The
climate of Rajasthan can be divided into four seasons: Summers,
Monsoon, Post-Monsoon and winter.
A summer, which extends from April to June, is the hottest
season, with temperatures ranging from 32 degree C to 45 degree
C. In western Rajasthan the temp may rise to 48 degree C,
particularly in May and June. At this time, Rajasthan's only
hill station, Mt Abu registers the lowest temperatures. In the
desert regions, the temperature drops at night. Prevailing winds
are from the west and sometimes carry dust storms (we call them
aandhi).

The second season Monsoon extends from July to September, temp
drops, but humidity increases, even when there is slight drop in
the temp (35 degree C to 40 degree C). 90% of rains occur during
this period.

The Post-monsoon period is from October to November. The average
maximum temperature is 33 degree C to 38 degree C, and the
minimum is between 18 degree C and 20 degree C.

The fourth season is Winter or the cold season, from December to
March. There is a marked variation in maximum and minimum
temperatures, and regional variations across the state. January
is the coolest month of the year. And temp may drop to 0 degree
C in some cities of Rajasthan, like Churu. There is slight
precipitation in the north and northeastern region of the state,
and light winds, predominantly from the north and northeast. At
this time, relative humidity ranges from 50% to 60% in the
morning, and 25% to 35% in the afternoon.

Temp & Rainfall

January to March
50F - 80F
10 degree C - 27 degree C
4MM - 7MM

April to June
75F - 105F
24 degree C - 45 degree C
11MM - 30MM

July to September
70F - 95F
21 degree C - 35 degree C
100MM - 165MM

October to December
55F - 85F
13 degree C - 30 degree C
3MM - 8MM

These are average temp and rainfall of Rajasthan, and may vary
for each city. The temperature is in degrees Fahrenheit.